The Leupold Mark 6 3-18x sets the standard for long range tactical rifle scopes. With the ultra-lightweight and compact body less than 12 inches, it is on average 20% lighter and shorted than other tactical scopes on the market. The robust 34mm nitrogen purged tube creates over 28 Mils of elevation adjustment with the M5B2 Auto-locking, Pinch and Turn 1/10 Mil turrets. The M5B2 elevation turret features a resettable double turn zero stop with a tactical revolution indicator detent that can be felt every 5 Mils of travel to help keep track of changes when dialing for long range. Superior light transmission, scratch resistance and crisp edge to edge clarity are three benefits that you will experience when DiamondCoat2 is coupled with the legendary Xtended Twilight Lens System. Other features of the Mark 6 include side focus, locking fast focus eye piece and powerful 6x zoom range. Covered by the Leupold Lifetime Warranty. Illuminated versions come with (1) CR2032 3V battery.